40131793 has 4 divisors (see below), whose sum is σ = 43218868. Its totient is φ = 37044720.

The previous prime is 40131769. The next prime is 40131797. The reversal of 40131793 is 39713104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7333264 + 32798529 = 2708^2 + 5727^2 .

It is a cyclic number.

It is not a de Polignac number, because 40131793 - 2⁵ = 40131761 is a prime.

It is a super-2 number, since 2×40131793² = 3221121618789698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40131797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1543518 + ... + 1543543.

It is an arithmetic number, because the mean of its divisors is an integer number (10804717).

Almost surely, 2^40131793 is an apocalyptic number.

It is an amenable number.

40131793 is a deficient number, since it is larger than the sum of its proper divisors (3087075).

40131793 is a wasteful number, since it uses less digits than its factorization.

40131793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087074.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 40131793 is about 6334.9659036178. The cubic root of 40131793 is about 342.3703823380.

Adding to 40131793 its reverse (39713104), we get a palindrome (79844897).

The spelling of 40131793 in words is "forty million, one hundred thirty-one thousand, seven hundred ninety-three".